<template>
  <div class="app-container">
    <!-- 图表区域 -->
    <div class="chart-container" style="margin-bottom: 20px; height: 400px;">
      <el-card>
        <div slot="header">
          <span>年度出版数量趋势图</span>
        </div>
        <div ref="chart" style="width: 100%; height: 340px;"></div>
      </el-card>
    </div>

    <!-- 查询表单 -->
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch" label-width="68px">
      <el-form-item label="年份" prop="publishYear">
        <el-input
          v-model="queryParams.publishYear"
          placeholder="请输入年份"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="出版数量" prop="bookCount">
        <el-input
          v-model="queryParams.bookCount"
          placeholder="请输入出版数量"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <!-- 操作按钮 -->
    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          plain
          icon="el-icon-plus"
          size="mini"
          @click="handleAdd"
          v-hasPermi="['show:publishYearTrend:add']"
        >新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="success"
          plain
          icon="el-icon-edit"
          size="mini"
          :disabled="single"
          @click="handleUpdate"
          v-hasPermi="['show:publishYearTrend:edit']"
        >修改</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="danger"
          plain
          icon="el-icon-delete"
          size="mini"
          :disabled="multiple"
          @click="handleDelete"
          v-hasPermi="['show:publishYearTrend:remove']"
        >删除</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="warning"
          plain
          icon="el-icon-download"
          size="mini"
          @click="handleExport"
          v-hasPermi="['show:publishYearTrend:export']"
        >导出</el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <!-- 数据表格 -->
    <el-table v-loading="loading" :data="publishYearTrendList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="id" align="center" prop="id" />
      <el-table-column label="年份" align="center" prop="publishYear" />
      <el-table-column label="出版数量" align="center" prop="bookCount" />
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-hasPermi="['show:publishYearTrend:edit']"
          >修改</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['show:publishYearTrend:remove']"
          >删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 分页 -->
    <pagination
      v-show="total>0"
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList"
    />

    <!-- 添加或修改对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="500px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="年份" prop="publishYear">
          <el-input v-model="form.publishYear" placeholder="请输入年份" />
        </el-form-item>
        <el-form-item label="出版数量" prop="bookCount">
          <el-input v-model="form.bookCount" placeholder="请输入出版数量" />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import * as echarts from 'echarts'
import { listPublishYearTrend, getPublishYearTrend, delPublishYearTrend, addPublishYearTrend, updatePublishYearTrend } from "@/api/show/publishYearTrend"

export default {
  name: "PublishYearTrend",
  data() {
    return {
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 显示搜索条件
      showSearch: true,
      // 总条数
      total: 0,
      // 出版数量趋势表格数据
      publishYearTrendList: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        publishYear: null,
        bookCount: null
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        publishYear: [
          { required: true, message: "请输入年份", trigger: "blur" },
          { type: "number", message: "年份必须为数字", trigger: "blur" }
        ],
        bookCount: [
          { required: true, message: "请输入出版数量", trigger: "blur" },
          { type: "number", message: "出版数量必须为数字", trigger: "blur" }
        ]
      },
      // 图表实例
      chartInstance: null,
      // 图表数据
      chartData: {
        years: [],
        counts: []
      }
    }
  },
  created() {
    this.getList()
  },
  mounted() {
    // 初始化图表
    this.initChart()
    // 监听窗口大小变化，自动调整图表尺寸
    window.addEventListener('resize', this.handleResize)
  },
  beforeDestroy() {
    // 销毁图表实例，释放资源
    if (this.chartInstance) {
      this.chartInstance.dispose()
    }
    // 移除事件监听
    window.removeEventListener('resize', this.handleResize)
  },
  methods: {
    /** 查询出版数量趋势列表 */
    getList() {
      this.loading = true
      listPublishYearTrend(this.queryParams).then(response => {
        this.publishYearTrendList = response.rows
        this.total = response.total
        this.loading = false
        // 更新图表数据
        this.updateChartData(response.rows)
      })
    },

    /** 初始化图表 */
    initChart() {
      // 创建图表实例
      this.chartInstance = echarts.init(this.$refs.chart)

      // 设置图表配置
      const option = {
        tooltip: {
          trigger: 'axis',
          backgroundColor: 'rgba(255, 255, 255, 0.9)',
          borderColor: '#ddd',
          borderWidth: 1,
          textStyle: { color: '#333' },
          formatter: '{b}年<br/>出版数量: {c}本'
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: {
          type: 'category',
          boundaryGap: false,
          data: this.chartData.years,
          axisLabel: {
            interval: 0,
            rotate: 30
          }
        },
        yAxis: {
          type: 'value',
          name: '出版数量(本)',
          min: 0,
          interval: 'auto',
          axisLabel: {
            formatter: '{value}'
          }
        },
        series: [
          {
            name: '出版数量',
            type: 'line',
            data: this.chartData.counts,
            smooth: true,
            symbol: 'circle',
            symbolSize: 8,
            emphasis: {
              scale: true
            },
            lineStyle: {
              width: 3
            },
            itemStyle: {
              color: '#409EFF',
              borderWidth: 2,
              borderColor: '#fff'
            },
            areaStyle: {
              color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                { offset: 0, color: 'rgba(64, 158, 255, 0.3)' },
                { offset: 1, color: 'rgba(64, 158, 255, 0)' }
              ])
            }
          }
        ]
      }

      // 设置图表配置项
      this.chartInstance.setOption(option)
    },

    /** 更新图表数据 */
    updateChartData(data) {
      // 排序数据（按年份升序）
      const sortedData = [...data].sort((a, b) => a.publishYear - b.publishYear)

      // 提取年份和数量
      this.chartData.years = sortedData.map(item => item.publishYear)
      this.chartData.counts = sortedData.map(item => item.bookCount)

      // 更新图表
      if (this.chartInstance) {
        this.chartInstance.setOption({
          xAxis: {
            data: this.chartData.years
          },
          series: [
            {
              data: this.chartData.counts
            }
          ]
        })
      }
    },

    /** 窗口大小变化时调整图表尺寸 */
    handleResize() {
      if (this.chartInstance) {
        this.chartInstance.resize()
      }
    },

    // 取消按钮
    cancel() {
      this.open = false
      this.reset()
    },

    // 表单重置
    reset() {
      this.form = {
        id: null,
        publishYear: null,
        bookCount: null
      }
      this.resetForm("form")
    },

    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1
      this.getList()
    },

    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm")
      this.handleQuery()
    },

    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.id)
      this.single = selection.length !== 1
      this.multiple = !selection.length
    },

    /** 新增按钮操作 */
    handleAdd() {
      this.reset()
      this.open = true
      this.title = "添加出版数量趋势"
    },

    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset()
      const id = row.id || this.ids
      getPublishYearTrend(id).then(response => {
        this.form = response.data
        this.open = true
        this.title = "修改出版数量趋势"
      })
    },

    /** 提交按钮 */
    submitForm() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          if (this.form.id != null) {
            updatePublishYearTrend(this.form).then(response => {
              this.$modal.msgSuccess("修改成功")
              this.open = false
              this.getList()
            })
          } else {
            addPublishYearTrend(this.form).then(response => {
              this.$modal.msgSuccess("新增成功")
              this.open = false
              this.getList()
            })
          }
        }
      })
    },

    /** 删除按钮操作 */
    handleDelete(row) {
      const ids = row.id || this.ids
      this.$modal.confirm('是否确认删除出版数量趋势编号为"' + ids + '"的数据项？').then(function() {
        return delPublishYearTrend(ids)
      }).then(() => {
        this.getList()
        this.$modal.msgSuccess("删除成功")
      }).catch(() => {})
    },

    /** 导出按钮操作 */
    handleExport() {
      this.download('show/publishYearTrend/export', {
        ...this.queryParams
      }, `publishYearTrend_${new Date().getTime()}.xlsx`)
    }
  }
}
</script>
